CN206492978U - A kind of groove knife - Google Patents

Abstract

The utility model discloses a slotting knife. The slotting knife comprises a handle, a clamping part integrally formed with the handle and a cutter head. The clamping part comprises a fixing part, a first clamping block and a height lower than The second clamping block of the first clamping block, the fixing part is connected with the tool handle, a clamping space for clamping the cutter head is formed between the first clamping block and the second clamping block, and the adjacent surfaces There are respectively a clamping block on the top, the two sides of the cutter head are respectively provided with a card slot for the clamping block to be inserted into, and a groove is provided in the middle of the fixed part for deformation through both sides, and the bottom of the groove is expanded to form A first decompression groove, a fastening bolt is arranged perpendicular to the groove on the fixed part, a threaded hole for matching the fastening bolt is provided on one side of the fixed part, and a passage for the fastening bolt to pass is provided on one side Holes have the advantage of strong adaptability.

Description

a groove knife

technical field

The utility model relates to a cutter in the field of mechanical processing, in particular to a slot cutter.

Background technique

At present, from a global perspective, cutting processing, as the main basic technology of manufacturing technology, is in a period of rapid development of manufacturing technology. With the development of manufacturing technology, it has entered the development of high-speed cutting, new cutting technology and processing methods. new stage. As an indispensable supporting process equipment for CNC machine tools, metal cutting tools have entered the development stage of CNC tools driven by CNC machining technology, showing the characteristics of high efficiency, high precision and high reliability. At the same time, with the high rigidity, high speed, and high precision of machine tools, high-performance cutting tools have become indispensable tools for high-speed, high-performance, and high-precision machining. High-speed cutting will become a new cutting process. At present, new cutting technologies such as dry cutting tools derived from high-speed cutting have shown many advantages and strong vitality. The current "green project" that implements clean and safe production has already developed in the industry. Nations rise. The implementation of "green engineering" and the development of "green manufacturing technology" are important issues in the development of cutting processing in the new century.

The authorized announcement number is CN201309006, and the Chinese patent with the application date of November 12, 2008 discloses a cubic boron nitride grooving tool, including a tool holder, a blade and a fastening bolt. The head is characterized in that a piece of cubic boron nitride material is welded to the cutting edge portion of the blade. The head of the knife shank is set at an inclination angle of 45° so that the width of the head of the knife shank is narrower than the width of the knife shank body. In the insert pocket where the insert is mounted on the head of the shank, the part relative to the flank of the insert is machined into an arc. Through the improvement of the utility model, the outer diameter grooving process can be realized on the inner side walls of the ring groove of the end face of the disc type parts, which overcomes the deficiency of the general grooving tool, and sets the rear end of the cutter head groove into an arc shape. The structure improves the rigidity of the cutter head, which greatly improves the cutting speed and service life of the cutter. At the same time, its dry cutting also avoids environmental pollution caused by the use of cutting fluid, thus effectively improving production efficiency and reducing costs. , improving the production environment.

The disadvantage of the prior art is that the blade is fixed in the groove adapted to the blade by fastening bolts. In this way, it will be difficult to place the blade in the groove when there may be a slight error in the processing of the groove or the blade. There is a gap in the groove, or around the blade and the groove, so that the cutter head shakes during the cutting process, causing poor cutting effect on the workpiece.

Utility model content

The purpose of the utility model is to provide a groove cutter, even if the cutter head has a certain processing error, the cutter head can be relatively stably fixed on the cutter seat, which has the advantage of strong adaptability.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A slotting knife, comprising a handle, a clamping part integrally formed with the handle, and a cutter head, the clamping part comprising a fixing part, a first clamping block and a second clamping block whose height is lower than that of the first clamping block block, the fixing part is connected with the handle of the knife, a clamping space for clamping the cutter head is formed between the first clamping block and the second clamping block, and a block is respectively provided on the adjacent surface, and the knife The two sides of the head are respectively provided with card slots for the clamping blocks to be inserted into. In the middle of the fixed part, there is a groove penetrating both sides for deformation. The bottom of the groove expands to form a first decompression groove. A fastening bolt is arranged perpendicular to the groove on the part, a threaded hole matched with the fastening bolt is arranged on one side of the fixed part, and a through hole for the fastening bolt to pass is arranged on one side.

With the above structure, the cutter head is plugged into the clamping space through the cooperation between the slot and the block. Since the groove and the first decompression groove leave a certain gap in the middle of the fixing part, the rigidity of the fixing part on both sides of the groove decreases. As a result, the fixed part may be deformed to a certain extent, and the fastening bolt is rotated, and the fastening bolt is threaded with the threaded hole on one side of the fixed part to draw the fixed part together, and then the first clamping block and the second clamping block firmly hold the cutter head Clamping on the clamping part reduces the difficulty of installation and enhances the stability and firmness between the cutter head and the clamping part.

Further preferably, a second decompression groove is provided at the bottom ends of the first clamping block and the second clamping block.

With the above structure, when the fixed part is folded towards the middle, the stiffness of the connection between the first clamping block, the second clamping block and the fixed part will be reduced through the second decompression groove, and the resistance to elastic deformation force will be reduced, so that the first clamping block The fixed part relative to the second clamping block can be slightly deformed at an angle, so that the surface adjoining the cutter head is kept in a horizontal state relative to the cutter head, so as to ensure that it fits closely with the cutter head and enhances its clamping force.

It is further preferred that: the end surface of the cutting part of the cutter head is provided with an inclined surface, and an inclined protrusion parallel to the cutting end surface protrudes from the fixing part.

With the above-mentioned structure, the inclination of the cutting part of the cutter head can reduce its cutting deformation and the friction between the blade and the chip on the one hand, prolong its service life, and on the other hand, ensure that the blade is sharp and enhance its cutting efficiency; The inclined protrusion parallel to the cutting end surface abuts against the cutter head to ensure that the protrusion height of the cutter head is consistent, and the surface of the processed hole is smoother.

It is further preferred that: the central axis of the shank is provided with a main channel of the internal cooling hole, and one end of the main channel of the internal cooling hole is provided with a sub-channel of the internal cooling hole that passes through the second clamping block and faces the processing area.

With the above-mentioned structure, when the cutting tool is working, the friction between the cutter head and the workpiece is extremely high, resulting in high temperature. The cutter head works in a high temperature state and is easy to wear. By pouring condensed water from the main channel of the internal cooling hole, the internal cooling hole is divided into channels It flows out from the middle and injects it into the workpiece to reduce the temperature, reduce the wear of the cutting part of the cutter head, and prolong the service life of the cutter head.

It is further preferred that two straight grooves are provided on the handle which are perpendicular to the main passage of the internal cooling hole and connect the main passage of the internal cooling hole with the sub-channels of the internal cooling hole, and one end of the two straight grooves passes through the outer wall of the handle , and the connection with the outer wall of the knife handle is closed by a threaded column and the thread of the straight groove to close the straight groove.

With the above-mentioned structure, when the sub-channels of the internal cooling hole are directly connected with the main channel of the internal cooling hole, it is necessary to open a curved groove in the handle. The groove connects the sub-channels of the internal cooling hole and the main channel of the internal cooling hole, which greatly reduces the difficulty of processing and reduces the requirements for processing technology; the straight groove is closed by the threaded column and the straight groove thread to prevent the condensed water from directly flowing from the straight groove flow out.

It is further preferred that: the second clamping block is also obliquely provided with a sub-channel communicating with the sub-channel of the internal cooling hole and facing the cutter head.

With the above-mentioned structure, part of the condensed water is directly injected onto the cutter head through the diversion channel, and the temperature of the cutter head is further cooled to enhance its cooling effect and prolong the service life of the cutter head.

It is further preferred that: the upper and lower ends of the cutter head are respectively provided with a cutting portion.

With the above structure, when the cutting part at one end is worn out, the cutter head can be rotated 180° to continue cutting with the other cutting part, which can achieve the effect of increasing the overall number of times of use and reducing the consumption of consumables.

It is further preferred that: the through hole on the fixing part is provided with a counterbore.

With the above-mentioned structure, the fastening bolt can be completely sunk into the fixing part through the countersunk hole provided on the through hole, so as to prevent the fastening bolt from protruding outside and causing abrasion due to collision with other things.

In summary, the utility model has the following beneficial effects:

1. Through the cooperation of the card slot on the cutter head and the card block, its stability and firmness are enhanced, and the clamping effect of the clamping part on the cutter head is strengthened;

2. Through the cooperation between the fastening bolt and the thread of the fixed part, the effect of convenient installation or replacement of the cutter head is achieved;

3. By injecting condensed water, the high temperature generated during the cutting work of the cutter head can be reduced, so as to reduce the wear of the cutter head and prolong the service life of the cutter head;

4. Through the certain elastic deformation capacity of the first clamping block and the second clamping block, the effect of being able to adapt to a certain machining error of the cutter head is achieved.

Description of drawings

Fig. 1 is a structural schematic diagram of the present embodiment, showing the overall structure;

Fig. 2 is the partial structural representation of present embodiment;

Fig. 3 is a partial cross-sectional schematic diagram of this embodiment, showing the connection structure between the main channel of the internal cooling hole and the sub-channels of the internal cooling hole;

Fig. 4 is a schematic cross-sectional view of the present embodiment;

Fig. 5 is a partial structural schematic diagram of this embodiment, showing the structure of the cutter head.

In the figure, 1. knife handle; 2. clamping part; 3. cutter head; 20. inclined protrusion; 21. fixed part; 22. first clamping block; 23. second clamping block; 24. clamping block ; 25, groove; 26, first decompression groove; 27, fastening bolt; 28, threaded hole; 29, through hole; 30, second decompression groove; 31, card groove; 32, cutting part; 4, The main channel of the internal cooling hole; 5, the sub-channel of the internal cooling hole; 6, the straight groove; 7, the threaded column; 8, the split channel.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new inventions are protected by patent law.

A slotting knife, as shown in Figure 1, includes a handle 1, a clamping part 2 integrally formed with the handle 1, and a cutter head 3, and the clamping part 2 includes a fixed part 21, a first clamping block 22 and a second The clamping block 23 and the cutter head 3 are placed in the clamping space formed by the first clamping block 22 and the second clamping block 23 .

With reference to Fig. 2 and 5, above-mentioned cutter head 3 two sides have draw-in groove 31, upper and lower two ends are all provided with cutting part 32, and cutting end face is inclined setting, when cutter head 3 one end cutting part 32 wears and tear, can put The cutter head 3 is turned over and the cutting part 32 at the other end is used to continue to use, so as to increase the overall number of uses and reduce the consumption of consumables; the above-mentioned first clamping block 22 and second clamping block 23 are provided with a block for inserting a card slot 31 24. The cutter head 3 passes through the slot 31 on it, and the slot 31 is plugged into the clamping space, and the lower end abuts against an inclined protrusion parallel to the cutting end surface.

Referring to Fig. 2, a groove 25 through both sides is provided in the middle of the above-mentioned fixed part 21, and the bottom of the groove 25 expands to form a first decompression groove 26, and a through hole 29 is set on one side of the fixed part 21 perpendicular to the groove 25, And on the through hole 29, there is a countersunk hole that the fastening bolt 27 is fully immersed in, and a threaded hole 28 is provided on the other side, and a fastening bolt 27 passes through the through hole 29 and threadedly cooperates with the threaded hole 28, because the groove 25 The rigidity of the fixed part 21 on both sides of the groove 25 is reduced by the first decompression groove 26, and the fixed part 21 on both sides of the groove 25 can be gathered in the middle by rotating the fastening bolt 27, which can strengthen the first clamping block 22 and the second clamping block. The clamping force of the holding block 23 to the cutter head 3; wherein, a second decompression groove 30 is provided at the joint between the adjacent surfaces of the first clamping block 22 and the second clamping block 23 and the fixed part 21, and the second decompression groove 30 is provided at the junction of the adjacent surface of the first clamping block 22 and the second clamping block 23, and the second decompression groove 30 is formed. The groove 30 reduces the rigidity between it and the fixed part 21, and resists the decline of the elastic force. The first clamping block 22 and the second clamping block 23 can be slightly deformed relative to the fixed part 21, and the fastening bolts 27 are tightened and gathered. When fixing the parts 21 on both sides of the groove 25, the first clamping block 22 and the second clamping block 23 are slightly deformed relative to the fixing part 21, so that the contact surface with the cutter head 3 is always in a horizontal state with the cutter head 3, keeping The first clamping block 22 and the second clamping block 23 are in close contact with the cutter head 3 to enhance its stability and firmness.

Referring to Figures 3 and 4, a main channel 4 of the internal cooling hole is provided on the central axis of the above-mentioned tool handle 1, and one end of the main channel 4 of the internal cooling hole is provided with a sub-channel 5 of the internal cooling hole that passes through the second clamping block 23 and faces the processing area. The handle 1 is also provided with two straight grooves 6 which are perpendicular to the main channel 4 of the internal cooling hole and communicate with the outer wall of the handle 1. The two straight grooves 6 connect the main channel 4 of the internal cooling hole with the sub-channel 5 of the internal cooling hole. The groove 6 is provided with a thread at the connection between the outer wall of the handle 1, and a threaded column 7 is threaded with the straight groove 6 to block the opening of the straight groove 6 to form an internal condensed water channel, and the condensed water flows in from the main channel 4 of the internal cooling hole. Concentrated spraying from the sub-channel 5 of the internal cooling hole, cooling the processing area, avoiding the high temperature generated by the tool head 3 processing the workpiece during the working process, causing the tool head 3 to wear out, wherein the second clamping block 23 There is also a slanted channel 8 connected to the inner cooling hole sub-channel 5 on the upper side, and facing the cutter head 3. Condensed water flows out from the diversion channel 8 to cool the cutter head 3 and further enhance the cooling of the cutter head 3. effect, avoiding the wear of the cutter head 3 and prolonging the service life of the cutter head 3.

Working principle: When assembling the cutter, slide the cutter head 3 into the clamping space along the clamping block 24 of the first clamping block 22 and the second clamping block 23, press the lower end against the inclined protrusion 20, and fasten the bolt 27 penetrates through the through hole 29, and threadedly cooperates with the threaded hole 28, tightens the fastening bolt 27, drives the first clamping block 22 and the second clamping block 23 to gather in the middle, clamps the cutter head 3, and then the threaded column 7 Block the openings of the two straight grooves 6, install the groove cutter on the milling machine, and connect the condensed water pipeline to the main channel 4 of the internal cooling hole. When processing the workpiece, inject condensed water and flow in from the main channel 4 of the internal cooling hole. Through the two straight grooves 6, it flows out from the inner cooling hole sub-channel 5 and the sub-channel 8 to cool the processing area and the cutter head 3.

Claims (8)

1. A slotting knife, comprising a handle (1), a clamping portion (2) and a cutter head (3) integrally formed with the handle (1), characterized in that: the clamping portion (2) includes a fixed part (21), the first clamping block (22) and the second clamping block (23) whose height is lower than the first clamping block (22), the fixed part (21) is connected with the knife handle (1), A clamping space for clamping the cutter head (3) is formed between the first clamping block (22) and the second clamping block (23), and a clamping block (24) is respectively provided on the adjacent surfaces, and the Both sides of the cutter head (3) are respectively provided with a slot (31) for the clamping block (24) to be inserted into, and a groove (25) is provided in the middle of the fixed part (21) for deformation through both sides, so The bottom of the groove (25) expands to form a first decompression groove (26), and a fastening bolt (27) is arranged perpendicular to the groove (25) on the fixed part (21), and one side of the fixed part (21) A threaded hole (28) cooperating with the fastening bolt (27) is provided on the top, and a through hole (29) for the fastening bolt (27) to pass is provided on one side. 2. A slotting knife according to claim 1, characterized in that: the bottom ends of the first clamping block (22) and the second clamping block (23) are provided with a second decompression groove (30). 3. A slotting cutter according to claim 2, characterized in that: the end face of the cutting part (32) of the cutter head (3) is set on an inclined plane, and the protrusion on the fixing part (21) is parallel to the cutting end face the sloped lugs (20). 4. A slotted cutter according to claim 3, characterized in that: the central axis of the handle (1) is provided with a main channel (4) of the internal cooling hole, and the main channel (4) of the internal cooling hole One end is provided with an internal cooling hole sub-channel (5) passing through the second clamping block (23) and facing the processing area. 5. A slotted knife according to claim 4, characterized in that: said handle (1) is provided with two channels perpendicular to the main channel (4) of the internal cooling hole and connecting the main channel (4) of the internal cooling hole Straight grooves (6) connected with the sub-channels (5) of the inner cooling hole, one end of the two straight grooves (6) penetrates the outer wall of the handle (1), and the connection with the outer wall of the handle (1) passes through a threaded column (7) cooperate with straight groove (6) screw thread to close straight groove (6). 6. A slotted knife according to claim 5, characterized in that: said second clamping block (23) is also provided with an oblique channel (5) communicating with the internal cooling hole, and facing the cutter head ( 3) The shunt channel (8). 7. A grooving cutter according to claim 6, characterized in that: the upper and lower ends of the cutter head (3) are respectively provided with a cutting portion (32). 8. A slotting knife according to claim 7, characterized in that: the through hole (29) on the fixing part (21) is provided with a countersink.